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Fault finding - Fault Finding Chart82D
ALP 25Starting protection (vehicle does not start when the ignition
key is turned)
NOTESCheck the battery voltage and the presence of (correct) fuel in the fuel tank.
Only consult this customer complaint after a complete check with the diagnostic tool.
Check the operation of the following statuses and parameters in particular: ET046
Immobiliser, ET239 Ignition switch position, ET142 Engine operation phase,
ET229 Injection immobiliser code and PR025 Engine speed.
Carry out a full conformity check on the protection and starting sub-function.
Note:
If the user makes three consecutive attempts to start the vehicle using a key which does not belong to the vehicle,
the injection computer goes into protection mode and there is no dialogue with the UCH.
Use the following procedure to bring the injection computer out of protection mode and to re-establish dialogue
between the injection computer and the UCH:
–Obtain a key which belongs to the vehicle.
–Put the key in the ignition switch in the + After ignition position for 20 seconds.
–Switch off the ignition and wait for the end of powerlatch (20 minutes).
If the engine will not start after this operation, apply the following procedure.
Check the battery (see 80A, Battery) and the charge circuit (see 16A, Starting-charging).
Carry out fault finding on the multiplex network (see 88B, Multiplexing).
Check the key using command SC018 "Checking a key".
If the key is allocated, obtain a second key belonging to the vehicle and start the engine.
If the engine starts with the second key, replace the first key with a new key and allocate the new key to the
vehicle using command SC015 "Key allocation".
Carry out fault finding on the multiplex network (see 88B, Multiplexing).
AFTER REPAIRCarry out another fault finding check on the system.
UCH_V44_ALP25
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Fault finding - Fault Finding Chart82D
ALP 25
CONTINUED 1
Is status ET239 "Ignition switch position" "APC"?
YES
Are there any faults on the UCH?
NO
Are there any faults on the injection system?
NO
Is status ET008 "UCH blank" "Yes"?
NO
Is status ET185 "Key code received" "Yes"?
YES
Is status ET229 "Injection immobiliser code"
"Programmed"?
YES
Is status ET250 "Injection" "Protected"?
NO
NORefer to the interpretation of status ET239
"Ignition switch position" (see 87B,
Passenger compartment connection unit).
YESDeal with any faults connected to the UCH
(see 87B, Passenger compartment
connection unit).
YESDeal with any faults connected to the injection
system (see 13B, Diesel injection and see
also 17B, Petrol injection).
YESProgram the UCH using command SC004
"UCH programming" and allocate the key
using command SC015 "Key allocation".
NO
NOProgram the injection code using command
SC017 "Injection immobiliser programming".
YESIf status ET077 "Impact detected" (available
in the injection system) is "Present", carry
out fault finding on the airbag (see 88C, Airbag
and pretensioners) otherwise carry out fault
finding on the injection system (see 13B, Diesel
injection and see also 17B, Petrol injection).
AFTER REPAIRCarry out another fault finding check on the system.
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Fault finding - Fault Finding Chart82D
ALP 25
CONTINUED 2
Carry out complete fault finding of the injection system (see 13B, Diesel injection and see also 17B, Petrol
injection) (See MR 411 Mechanical systems, 13A, Fuel supply) (see MR 411 Mechanical systems, 13C,
Preheating) (See MR 411 Mechanical systems, Ignition).
If the fault is still present, contact Techline.
Check that there are no powerful electromagnetic wave sources (CB (Citizen Band), mobile phone in close
proximity to the transponder ring).
Switch the ignition off and then on again.
Check that fuse F8 (15 A) is sound and fitted in the passenger compartment fuse and relay box.
Replace the fuse if necessary.
Check the condition and connection of the transponder ring 4-track connector (bent, oxidised, broken tabs).
Repair if necessary.
Check that the earth on connection NAM of the transponder aerial connector is perfect.
If the connection is faulty and there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Check for + after ignition feed on connection AP43 of the transponder aerial connector.
If the connection is faulty and there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Check the condition and connection of the 40-track UCH connector PE1 (tabs bent, broken, oxidised, etc.).
Repair if necessary.
Check the insulation, continuity and absence of interference resistance of the following connections:
●Connection code 80Y between components 1618 and 645.
●Connection code 80X between components 1618 and 645.
●Connection code AP43 between components 1618 and 1016.
If the connection or connections are faulty and there is a repair procedure (see Technical Note 6015A, Electrical
wiring repair, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
If the connections are correct but the fault is still present, replace the transponder ring.
AFTER REPAIRCarry out another fault finding check on the system.
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